No tilling alfalfa orchard with hay buster

I just got 21 acres to plant in an alfalfa orchard mix... It it wheat stubble now. I plan to no till 15 pounds of alfalfa, 8 pounds of orchard and 2 pounds of brome. My seed salesman says plant the Alfalfa one direction then go over it again another direction to plant the grass. I'm wondering if this theory is valid? It's going to take me long enough with a ten foot drill.... It does have a small seed legumes box and a separate grass seed box with mixers so I could do it in one pass. Then both would be in the same row... The drill is 10$ per acre, what's my best bet?

No tilling alfalfa orchard with hay buster